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Diagnosis Procedure
1.CHECK DTC
With M.U.T.-III SE
  1. Ignition switch ON.
  2. Select “Self Diagnostic Result” mode of “HVAC” using M.U.T.-III SE.
  3. Check following DTC.
    DTCItems
    (M.U.T.-III SE screen terms)
    		Reference
    B24B4-02A/C CONTROL COMMDTC Description
    U1CB1-02A/C control 2 communicationDTC Description
Is DTC detected?
Perform DTC diagnosis procedure that is detecting.
Replace A/C amp. Refer to Removal and Installation.